Credentials rejected
Check spelling and the required identifier. If forgotten, use recovery instead of continuing to guess.
An access failure can involve credentials, the device or the destination. Identify the symptom before changing settings. This page offers explanations and does not collect login credentials.

Use the address of the service where you created the account. A similar name or logo is not enough to identify it. Do not enter an existing password at an unexpected new destination.
Check whether the form expects a username, email or phone number. Look for extra spaces in copied text and the keyboard language. Repeatedly submitting incorrect information can make a temporary restriction worse.
If recovery is necessary, follow the known service's own process. Avoid making repeated password changes without checking the result. Once recovery succeeds, stop trying the old credentials.
One error does not require changing every setting. Use the wording and timing of the message to narrow the likely cause.
Check spelling and the required identifier. If forgotten, use recovery instead of continuing to guess.
Reopen it on a stable connection first. Do not erase all browser data before preserving anything you still need.
Check whether you initiated the request. If not, keep the code private and review security.

Decline password saving when using someone else's phone or computer. Sign out of the relevant service and close sensitive tabs when finished. Closing the browser alone should not be treated as signing out.
If access looks unfamiliar, use a clean device under your control. Secure the connected email account before updating the relevant credentials. Do not start this process through a suspicious message link.
Note its wording and time without capturing the password.
Compare the address, keyboard and identifier field.
Follow an available recognized process and look for confirmation.
Stop repeated attempts and give the relevant service a concise description.
No. It explains access and recovery. Do not enter a password here.
Not always. Follow the identifier marked on the relevant form.
Check whether old saved credentials are being inserted. If the error remains, seek support instead of increasing attempts.
Do not share it. Review the security of your email and the relevant account.